http://www.medications.com/effect/view/16088 i am a 52 year old male with many med. problems. I have taken Tequin twice, with no problems. I am now on Levaquin, 750 mg.X 10 days for an absessed tooth. I have taken 3. I won't take any more. I have had the following side effects: Lightheaded, Shakey, sw